linux-kernel - Re: [LKP] [PATCH] drm/radeon: Try to init amdkfd only if 64 bit kernel

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Date:	Sun, 11 Jan 2015 13:57:59 +0200
From:	Oded Gabbay <oded.gabbay@....com>
To:	Kees Cook <keescook@...omium.org>
CC:	Rusty Russell <rusty@...tcorp.com.au>,
	Andi Kleen <ak@...ux.intel.com>,
	Alex Deucher <alexdeucher@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Dana Elifaz" <Dana.Elifaz@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	"Maling list - DRI developers" <dri-devel@...ts.freedesktop.org>,
	Alexander Deucher <Alexander.Deucher@....com>,
	LKP ML <lkp@...org>
Subject: Re: [LKP] [PATCH] drm/radeon: Try to init amdkfd only if 64 bit kernel



On 01/07/2015 12:58 AM, Rusty Russell wrote:
> Kees Cook <keescook@...omium.org> writes:
>> On Sun, Jan 4, 2015 at 8:28 PM, Rusty Russell <rusty@...tcorp.com.au> wrote:
>>> Kees, as far as I can tell you need another 0-terminated vmlinux.relocs
>>> section for weak symbols.  These should not be relocated if already 0.
>>
>> A few questions:
>>
>> Why doesn't this break on 32-bit without kASLR? 32-bit does relocation
>> by default, even without CONFIG_RANDOMIZE_BASE.
> 
> Well, the offset was 0 until I removed CONFIG_HIBERNATE.
> 
>> Are there any symbols that are NULL that aren't weak? I'd expect all
>> strong symbols to have non-zero offsets, but I must be
>> misunderstanding something here.
> 
> I don't think there would be.  Anyway, you might be able to filter them
> out in x86/tools/relocs itself.
> 
> Cheers,
> Rusty.
> 

Hi Kees,

Did you had time to look at the problem ?

	Oded
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